EP2710243B1 - Multi-cylinder piston engine - Google Patents

Multi-cylinder piston engine Download PDF

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Publication number
EP2710243B1
EP2710243B1 EP12716482.0A EP12716482A EP2710243B1 EP 2710243 B1 EP2710243 B1 EP 2710243B1 EP 12716482 A EP12716482 A EP 12716482A EP 2710243 B1 EP2710243 B1 EP 2710243B1
Authority
EP
European Patent Office
Prior art keywords
valve
engine
cam
cylinder
pressure medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12716482.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2710243A1 (en
Inventor
Magnus Sundsten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2710243A1 publication Critical patent/EP2710243A1/en
Application granted granted Critical
Publication of EP2710243B1 publication Critical patent/EP2710243B1/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0276—Actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder scavenging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B21/00—Engines characterised by air-storage chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02—Engines with prolonged expansion
    • F02B41/10—Engines with prolonged expansion in exhaust turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
    • F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
    • F02B47/06—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including non-airborne oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0242—Variable control of the exhaust valves only
    • F02D13/0246—Variable control of the exhaust valves only changing valve lift or valve lift and timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0273—Multiple actuations of a valve within an engine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
    • F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2760/00—Control of valve gear to facilitate reversing, starting, braking of four stroke engines
    • F01L2760/001—Control of valve gear to facilitate reversing, starting, braking of four stroke engines for starting four stroke engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/034—Pneumatic engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M23/00—Apparatus for adding secondary air to fuel-air mixture
    • F02M2023/008—Apparatus for adding secondary air to fuel-air mixture by injecting compressed air directly into the combustion chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a multi-cylinder piston engine according to the preamble of claim 1.
  • Turbo lag refers to the time that is required after a load increase for reaching a state where the turbocharger works effectively. Especially when the initial load is low, the turbocharger cannot immediately fully respond to the increased combustion air demand, and this leads in reduced rotation speed of the engine when the load suddenly increases. Lack of combustion air can also occur when the engine is operated at part load.
  • the object of the present invention is to provide an improved multi-cylinder internal combustion engine that comprises simple and reliable means for controlling the injection of additional oxygen containing gas into the cylinders of the engine.
  • the characterizing features of the engine according to the present invention are given in the characterizing part of claim 1.
  • a multi-cylinder piston engine comprises means for introducing combustion air into the cylinders of the engine and at least one cam-operated valve lifting device for each cylinder of the engine, the valve lifting device being arranged to open a gas exchange valve.
  • the engine further comprises an arrangement for introducing additional oxygen containing gas into the cylinders of the engine, the arrangement comprising a pressure medium source for supplying the additional oxygen containing gas, an injection valve in connection with each cylinder for introducing the pressure medium into the cylinder, means for connecting the pressure medium source to the injection valves, and a control valve for each cylinder of the engine for controlling the operation of the injection valve.
  • Each control valve is arranged to be operated by a gas exchange cam of the respective cylinder.
  • the invention has several advantages.
  • the invention enables simple control of the injection of additional oxygen containing gas.
  • Identical cams can be used regardless of the cylinder number of the engine.
  • the gas exchange cam comprises a portion that is arranged below the base circle of the cam for operating the control valve.
  • the control valve is operated by a portion of the gas exchange cam that is below the base circle of the cam, a simple and reliable control mechanism can be achieved.
  • control valve is arranged to allow pressure medium flow to the injection valve when the valve lifting device is engaged with the portion of the gas exchange cam that is below the base circle of the cam.
  • control valve comprises a valve member that is movable by the valve lifting device.
  • the valve lifting device comprises a plunger pushing the valve member towards the gas exchange cam when the valve lifting device is engaged with the portion of the gas exchange cam that is below the base circle of the cam.
  • the valve member is pushed towards the valve lifting device by the pressure of the pressure medium.
  • the injection valve is arranged to be opened by the pressure of the pressure medium.
  • the gas exchange cam is an exhaust cam.
  • the exhaust cam is used for controlling the injection valve, the portion of the cam that is below the base circle is far from the lobe of the cam. This ensures smooth operation of the valve lifting device.
  • the invention can be used even in two-stroke engines with cam-operated exhaust valves.
  • the arrangement comprises a main air assist valve for initiating the injection of the pressure medium into the cylinders of the engine.
  • each injection valve is arranged in a cylinder head.
  • the injection valve is arranged to introduce the pressure medium directly into the cylinder.
  • the injection valve is a starting valve. It is practical to use the same valves that are used for introducing starting air into the cylinders also for introducing the oxygen containing gas into the cylinders.
  • Fig. 1 shows schematically a piston engine 20 with an arrangement for introducing additional oxygen containing gas into the cylinders 19 of the engine 20.
  • the additional oxygen containing gas is pressure medium that is introduced into the cylinders 19 of the engine 20 before ignition but after the normal air intake has ended. In a four-stroke engine this means that the pressure medium is introduced into a cylinder 19 after closing of the intake valves of that cylinder 19.
  • the pressure medium can be for instance pressurized air or pure oxygen. Pressurized air can be produced by a compressor and is therefore suitable for many applications.
  • the term "additional combustion air" is used for the pressure medium.
  • the invention is not limited to the use of air as the pressure medium.
  • the engine 20 comprises six cylinders 19, but the engine 20 could comprise any reasonable number of cylinders 19 arranged for instance inline or in a V-configuration.
  • the engine 20 is a large internal combustion engine, such as those used for producing electricity and/or heat at a power plant or as main or auxiliary engines in ships.
  • the additional combustion air is stored in an air tank 18 that works as a pressure medium source and from which the additional combustion air can be introduced into the cylinders 19 of the engine 20 in an air duct 26.
  • the air tank 18 can be filled by a compressor (not shown).
  • Each cylinder 19 of the engine 20 is provided with an injection valve 10 for introducing additional combustion air into the cylinder 19.
  • the injection valves 10 can be separate valves that are only used for injecting the additional combustion air into the cylinders 19, or they can be the same valves that are used for introducing starting air into the cylinders 19.
  • FIG 2 is shown an injection valve 10 in connection with a cylinder head 23.
  • Each cylinder of the engine 20 is provided with its own cylinder head 23.
  • the cylinder head 23 is provided with an intake duct 32, through which the combustion air is introduced into the cylinder 19, and with an exhaust duct 33 for guiding exhaust gases out of the cylinder 19.
  • One or more intake valves 24 and one or more exhaust valves 25 are arranged to open and close the connection between the cylinder 19 and the intake duct 32 and the exhaust duct 33.
  • the injection valve 10 is arranged to introduce the additional combustion air directly into the cylinder 19.
  • each injection valve 10 is controlled by a respective control valve 12.
  • Each cylinder 19 of the engine 20 can also be provided with more than one injection valves 10. If each cylinder 19 is provided for instance with two injection valves 10, both valves 10 can be controlled by the same control valve 12.
  • the control valves 12 are connected to the air duct 26.
  • the air duct 26 is provided with a main air assist valve 17 for controlling when the air assisting of the engine 20 is in use.
  • An example of the injection valve 10 and the control valve 12 is shown as a simplified illustration in Figs. 3-6 .
  • the engine 20 comprises a valve lifting device 4 and a gas exchange cam 1 for each cylinder 19 of the engine 20.
  • the gas exchange cam 1 is shown in the figures as being rotated 90 degrees around its vertical axis to better illustrate the cam profile 2.
  • the cam profile 2 of the gas exchange cam 1 comprises a base circle 2a, a lobe 2b and a portion 2c that is arranged below the base circle 2a.
  • the expression "below the base circle” means that the radius of that portion of the cam profile 2 is smaller than the radius of the base circle 2a.
  • the radius of the portion 2c does not need to be constant.
  • the gas exchange cam 1 is an exhaust cam and the valve lift-ing device 4 is arranged to open an exhaust valve 25 of the engine 20.
  • the cam lifting device 4 comprises a body part 5 and a reciprocating plunger 6 that is arranged inside the body part 5.
  • the plunger 6 is arranged to lift a push rod 8.
  • a cam follower 3 is attached to the plunger 6 with a bearing.
  • a coil spring 7 between the body part 5 and the plunger 6 pushes the cam follower 3 against the cam profile 2.
  • a second spring 29 for eliminating clearance between the push rod 8 and the piston 30 is arranged between the piston 30 and the plunger 6.
  • the second spring 29 keeps the piston 30 against the end of the push rod 8 so that no gap is formed between the push rod 8 and the piston 30 or between the upper end of the push rod 8 and the rocker arm (not shown). This ensures smooth operation of the valve lifting device 4.
  • the cam lifting device 4 can be provided with some other arrangement that ensures that the exhaust valves 25 are not affected by the portion 2c of the cam profile 2 that is below the base circle 2a.
  • the cam lifting device 4 can be provided with a stopper surface that prevents the push rod from following the plunger 6 when the cam follower enters the portion 2c of the cam profile 2 that is below the base circle 2a.
  • the valve lifting arrangement works in a conventional manner.
  • the cam follower 3 is on the portion 2c of the cam profile 2 that is below the base circle 2a, the plunger 6 is at its lowest position.
  • the cam follower 3 becomes eventually engaged with the lobe 2b of the cam profile 2.
  • the plunger 6 and the push rod 8 are moved upwards and the exhaust valve 25 is opened.
  • figure 4 is shown the situation where the exhaust valve 25 is fully open.
  • Each cylinder 19 of the engine 20 is provided with an injection valve 10 comprising a valve member 22.
  • the injection valve 10 is kept closed by a spring 11.
  • each valve lifting device 4 is provided with a control valve 12.
  • the cam follower 3 When the cam follower 3 is engaged with the portion 2c of the cam profile 2 that is below the base circle 2a, the plunger 6 pushes a valve member 13 inside the control valve 12 downwards, as shown in Fig. 5 .
  • the main air assist valve 17 is opened. This allows the additional combustion air to flow in the air duct 26 to the control valves 12.
  • the pressurized air enters the control valves 12 via inlet channels 14.
  • the air pressure pushes the valve member 13 inside the control valve 12 upwards into the position shown in Fig. 4 .
  • the valve member 13 thus allows the pressurized air to flow out of the control valve 12 through a drain channel 16. The air is released from the drain channel 16 for instance into the engine room.
  • figure 7 is shown as a graph the positions of the cam followers 3 at different crank angles.
  • the broken line shows the position of the cam follower of the intake valve and the solid line the position of the cam follower of the exhaust valve.
  • the plungers 6 follow the same curves.
  • the push rods 8 and the valve lifts also follow the same curves with the exception that because of the piston/spring arrangement 29, 30 of the valve lifting devices 4, the vertical positions of the push rods 8 cannot be negative.
  • the area below the horizontal axis indicates how the cam follower 3 of the exhaust valve lifting device 4 is engaged with the portion 2c below the base circle 2a.
  • the injection of the additional combustion air takes place during this phase, which starts in the embodiments shown in the figures just before bottom dead center (BDC) during the intake stroke and lasts until approximately 90 degrees of crank angle after BDC during the compression stroke.
  • BDC bottom dead center

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP12716482.0A 2011-05-17 2012-03-22 Multi-cylinder piston engine Active EP2710243B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20115470A FI123065B (fi) 2011-05-17 2011-05-17 Monisylinterinen mäntämoottori
PCT/FI2012/050293 WO2012156573A1 (en) 2011-05-17 2012-03-22 Multi-cylinder piston engine

Publications (2)

Publication Number Publication Date
EP2710243A1 EP2710243A1 (en) 2014-03-26
EP2710243B1 true EP2710243B1 (en) 2015-04-15

Family

ID=44071597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716482.0A Active EP2710243B1 (en) 2011-05-17 2012-03-22 Multi-cylinder piston engine

Country Status (6)

Country Link
EP (1) EP2710243B1 (zh)
JP (1) JP5841660B2 (zh)
KR (1) KR101768268B1 (zh)
CN (1) CN103608558B (zh)
FI (1) FI123065B (zh)
WO (1) WO2012156573A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI124813B (fi) * 2013-01-07 2015-01-30 Wärtsilä Finland Oy Ohjausjärjestely ja menetelmä pakoventtiilin ohjaamiseksi
FI20135018L (fi) * 2013-01-07 2014-07-08 Waertsilae Finland Oy Venttiilinnostojärjestely ja menetelmä pakoventtiilin käyttämiseksi
JP6254934B2 (ja) 2014-12-26 2017-12-27 ヤンマー株式会社 エンジン
JP6228938B2 (ja) * 2015-01-05 2017-11-08 三菱重工業株式会社 内燃機関の起動装置及び方法
EP3303795B1 (en) * 2015-06-03 2020-04-15 Wärtsilä Finland Oy An internal combustion piston engine, a method of starting an internal combustion piston engine and a control unit
CN106321181B (zh) * 2015-06-29 2019-07-09 上海高斯通船舶配件有限公司 内燃发动机液压式气门升程调节缓冲装置
KR102084908B1 (ko) 2017-03-17 2020-03-04 바르실라 핀랜드 오이 내연 피스톤 엔진의 가스 교환 밸브용의 제어 장치 및 내연 엔진의 가스 교환 밸브용의 제어 장치의 작동 방법

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JPH0696977B2 (ja) * 1986-06-27 1994-11-30 日野自動車工業株式会社 エンジンの空気吹込み装置
NL8602858A (nl) * 1986-11-11 1988-06-01 Stork Werkspoor Diesel Bv Viertakt verbrandingsmotor met drukvulling en werkwijze voor het bedrijven daarvan.
SE511835C2 (sv) * 1996-05-02 1999-12-06 Volvo Ab Anordning och förfarande för tillförsel av tillskottsluft vid en förbränningsmotor
JP2982754B2 (ja) * 1997-07-25 1999-11-29 三菱自動車工業株式会社 筒内噴射型火花点火式内燃エンジン
DE19848418A1 (de) 1998-10-21 2000-04-27 Asea Brown Boveri Verfahren zum Betrieb einer Dieselbrennkraftmaschine
US7203593B2 (en) * 2005-06-29 2007-04-10 Altronic, Inc. Air starter and electronic control therefor
FI119703B (fi) * 2005-07-01 2009-02-13 Waertsilae Finland Oy Mäntämoottorin paineväliainetoiminen käynnistysjärjestely
FR2916238B1 (fr) * 2007-05-15 2013-01-18 Valeo Sys Controle Moteur Sas Moteur thermique a recyclage de gaz d'echappement integre
US7958864B2 (en) * 2008-01-18 2011-06-14 Sturman Digital Systems, Llc Compression ignition engines and methods
FI124120B (fi) * 2008-07-31 2014-03-31 Wärtsilä Finland Oy Ohjausjärjestely mäntämoottorissa
FI121245B (fi) * 2008-10-29 2010-08-31 Waertsilae Finland Oy Ohjausjärjestely venttiilien käyttökoneistolle ja menetelmä venttiilien käyttökoneiston sulkemisliikkeen ohjaamiseksi

Also Published As

Publication number Publication date
EP2710243A1 (en) 2014-03-26
FI20115470A0 (fi) 2011-05-17
WO2012156573A1 (en) 2012-11-22
KR101768268B1 (ko) 2017-08-14
JP5841660B2 (ja) 2016-01-13
CN103608558B (zh) 2017-01-18
JP2014518977A (ja) 2014-08-07
KR20140027363A (ko) 2014-03-06
FI123065B (fi) 2012-10-31
CN103608558A (zh) 2014-02-26

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